A hand-held brain scanner
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London air ambulance trials hand-held brain scanner

30 December 2015 Last updated at 08:51 GMT

London's air ambulance is trialling a hand-held scanner which can detect potentially life-threatening brain injuries.

The device, called an "infrascanner", can spot clots on the surface of the brain, which - if left untreated - can lead to disability or death.

Fergus Walsh reports.